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Flight Reliability

UA 4681 · United Airlines

Denver → LEX (DEN–LEX)97% of its flights flew this route. The rest (ORD–SDF, ORD–CVG) are included in these numbers.

79
Usually Fine
WanderNerd Reliability Score
73%
Arrive within 15 minutes
9 min
Average arrival delay
0.5%
Cancelled
5 min early
Median arrival delay

Based on 364 historical flights. Data through May 2026.

What the data says

The 3–6 PM departure wins.

UA 4681 departing between 3–6 PM arrived on time 74% of the time, versus 60% between 6–9 PM.

Tuesday comes out ahead.

A small edge: 75% on time on Tuesdays against 69% on Mondays.

A bit behind the United Airlines network.

UA 4681 arrived on time 73% of the time, versus 79% across the United Airlines network.

Trending in the right direction.

UA 4681 arrived on time 83% of the time over the last three months in the data, compared with 75% in the three months before that.

The breakdown

On-time by weekday
  • Mon69%(52 flights)
  • Tue75%(52 flights)
  • Wed73%(52 flights)
  • Thu75%(51 flights)
  • Fri73%(52 flights)
  • Sat75%(51 flights)
  • Sun73%(52 flights)
On-time by departure window
  • 3–6 PM74%(351 flights)
  • 6–9 PM60%(10 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
77%
May

Jun 57% → May 77% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202557%30
July 202542%31
August 202558%31
September 202577%30
October 202584%31
November 202590%29
December 202574%31
January 202669%29
February 202682%28
March 202681%31
April 202690%30
May 202677%31
Departures on time
76%
Diverted
0%
Flights flown
362
Months covered
12

Same route, other flights

Keep nerding

Based on 364 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.